My experience has been that studios track torrents (or hire some merc company to do it for them) then pout to your ISP when they catch you (I've heard they look at seeders harder than downloaders) then the ISP sends you a nastygram to stop it or else they can cut off your service and whatnot and maaaaybe the content owner will sue you - much more likely to happen with new first-run movies and TV. It's almost always a civil matter and not likely to get you thrown in prison or anything
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